Effect of low-level jet height on wind farm performance

Low-level jets (LLJs) are the wind maxima in lowest 50 to 1000 m of atmospheric boundary layers. Due their significant influence on power production farms, it is crucial understand interaction between LLJs and farms. In presence a LLJ, there positive negative shear regions velocity profile. The continuously turbulent, while have limited turbulence. We present large eddy simulations farms which LLJ above, below, or middle turbine rotor swept area. find that wakes recover relatively quickly when above turbines. This due high turbulence below downward vertical entrainment created by momentum deficit farm production. harvests jet's energy aids wake recovery. However, area, recovery very slow low LLJ. budget analysis reveals fluxes maximum minimum respectively. Surprisingly, we creates flux upward facilitates extraction from jet, beneficial for performance downwind